JPH07219023A - Instant film pack - Google Patents

Abstract

PURPOSE:To simplify the structure so as to reduce the manufacturing cost and to easily recycle instant film pack after being used by forming an opening to which a pressure member for pressing instant film is inserted on the back surface of a pack case. CONSTITUTION:This instant film pack 2 incorporated in an instant camera is constituted of the pack case 3, the instant film 4, a light shading board 5, a light shading sheet 6, and an elastic board 7. The pack case 3 has the exposure aperture 8 of the instant film 4 on the front surface, a press aperture 9 to which the press board provided on the camera side is inserted on the back surface, the light shading board 5, the light shading sheet 6, and a film exit 11 for ejecting the instant film 4 on the upper surface. A groove to which a claw 10 provided on the camera side for respectively pushing out the light shading board 5 at the time of the start of use and pushing out an exposed film for each completion of photographing from the film exit 11 is inserted is provided at a lower part. on the front surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant film pack used for an instant camera, and more particularly to an instant film pack which can be easily recycled.

[0002]

2. Description of the Related Art An instant camera capable of obtaining a developed image recording sheet immediately after photographing is widely used for recording in academic fields and on-site photographing requiring quickness. Such an instant camera is generally used by loading an instant film pack formed of hard plastic.

In this instant film pack, a plurality of mono-sheet type self-developing process type instant films are conventionally stacked and stored, and the structure is such that, in addition to the pack body for storing the instant film, exposure is performed. It consisted of an exposure opening for giving the instant film surface, a discharge opening for discharging the instant film after exposure, and a metal plate-shaped pressing member for pressing the instant film so as to contact the back surface of the exposure window. .

[0004]

However, the pressing member is usually formed by pressing a flat metal plate into a frame, forming a spring portion for pressing, and welding the film to a film pack. The cost of the entire film pack increased, and the structure had to be complicated. Further, as described above, the instant film pack has a complicated structure and is expensive, but after the shooting is completed, it becomes a useless long product, which causes environmental problems and effective use of resources (reuse). Therefore, the resin case and the metal pressing member must be separated and discarded, which is very troublesome.

The present invention has been made in view of the above circumstances, and the structure of an instant film pack is obtained by using an instant camera having a pressing member for pressing the instant film contained in the instant film pack. To reduce manufacturing costs,
Moreover, it is an object of the present invention to provide an instant film pack that can be easily recycled after use.

[0006]

To achieve the above object, an opening into which a pressing member for pressing the instant film toward the exposure opening enters is formed on the back surface of the pack case of the instant film pack, and the opening is covered. In addition to providing a flexible light-shielding sheet, one end of this light-shielding sheet is fixed to the rear end of the light-shielding plate that covers the exposure opening of the pack case, and the light-shielding plate is discharged from its tip through the instant film discharge port. It is designed to be withdrawn.

Further, in claim 2,
On the back of the pack case of the instant film pack,
Form an opening into which the pressing member that presses the instant film toward the exposure opening enters, and fold a flexible band-shaped light-shielding sheet that covers this opening from the outside of the pack case in a light-tight manner on the side that faces the exit of the instant film. That is, the opening is doubly covered, the discharge port is covered, and further the exposure opening is covered and then fixed to the rear end of the light-shielding plate stacked thereon.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an instant film pack embodying the present invention, and FIG. 3 is an external perspective view thereof. The instant film pack 2 built in the instant camera includes a pack case 3, an instant film 4, a light blocking plate 5, a light blocking sheet 6, which are built in the pack case 3.
And an elastic plate 7.

The pack case 3 is formed of a relatively hard material such as black light-shielding thermoplastic resin or pulp, and is provided on the front side with the exposure opening 8 of the instant film 4 and on the back side with the camera side. Further, a pressing opening 9 for inserting a later-described pressure plate and a light-shielding plate 5, a light-shielding sheet 6, and a film outlet 11 for discharging the instant film 4 are provided on the upper surface. Also, in the lower front,
In order to push out the light-shielding plate 5 at the start of use and the exposed film at the end of each shooting from the film outlet 11,
A groove 12 into which the claw 10 provided on the camera side is inserted is provided.

The mono-sheet type self-developing type instant film 4 is provided with a developing solution pod 4b on the exposed sheet 4a coated with a photosensitive material. Then, the exposure surface of the exposure sheet 4a is stacked and housed in the pack case 3 with the exposure surface facing the exposure opening 8.

The light shielding plate 5 is formed by molding a black, relatively light-shielding and relatively hard material into a plate shape, and is inserted between the exposure opening 8 of the pack case 3 and the instant film 4, and the exposure opening 8 is formed in the pack case. It is light tightly covered from inside 3. Further, one end of a light shielding sheet 6 described later is fixed to the lower portion of the light shielding plate 5.

The light-shielding sheet 6 is made of a soft light-shielding resin sheet, one end of which is fixed to the lower portion of the light-shielding plate 5, and the other end of which extends around the lower portion of the pack case 3 to form the elastic plate 7 and the pressing opening 9. It spreads out between them and covers the pressing opening 9 in a light-tight manner.
Then, when the light-shielding plate 5 is pulled out from the film outlet 11 at the start of use, it is integrally discharged.

The elastic plate 7 is formed by molding resin or paper into a plate shape, and is inserted between the back surface of the instant film 4 and the light shielding sheet 6. The elastic plate 7 has a function as a cushioning member for pressing the instant film 4 when a pressure plate, which will be described later, provided on the camera side is inserted into the pressing opening 9.

Next, the operation of these embodiments will be described. FIG. 5 is an external perspective view of an instant camera in which the instant film pack of the present invention is used, and FIG. 4 is a sectional view thereof. Further, FIG. 2 is a cross-sectional view of the vicinity of the instant film pack of the instant camera. The instant camera body 15 has a front projection 16 provided with a taking lens 20 and the like at the time of shooting so that it can be easily carried.

The photographer preliminarily uses the instant camera body 1
Open the back cover 17 of 5 and instant film pack 2
Is set in the film chamber 18. Then, when the back cover 17 is closed, a part of the pressure plate 19 projecting inside the back cover 17 is pushed through the pressing opening 9 and the instant film pack 2 is pressed.
2 and 3, as shown in FIGS. 2 and 3, the instant film 4 is pressed through the light-shielding sheet 6 and the elastic plate 7 with its end portion curved toward the exposure opening 8.

When the back cover 17 is completely closed, the claw 10 provided in the lower portion of the instant camera body 15 shown in FIG. 3 enters the groove 12 of the instant film pack 2 and presses the lower portion of the light shielding plate 5 upward. Then, the tip of the shading plate 5 is discharged from the film outlet 11. Film exit 11
The shading plate 5 discharged from the instant camera body 1
The rotation of the unfolding roller 21 provided on the upper part of the sheet 5 discharges it from the opening 22 on the upper part of the instant camera body 15.

The light-shielding plate 5 moves the developing roller 21 toward the opening 22.
At the same time, the light-shielding sheet 6 fixed to the end of the light-shielding plate 5 is circulated between the lower end of the instant film 4 and the lower part of the pack case 3 while being drawn between the exposure opening 8 and the instant film 4. And is discharged together with the light shielding plate 5 from the film outlet 11 to the opening 22. Since the developing roller 21 is stopped when the shading plate 5 is discharged from the opening 22, thereafter, the photographer manually pulls the shading plate 5 to open the shading sheet 6 in the opening 2.
It is designed to be pulled out from 2.

When the shading plate 5 and the shading sheet 6 are completely discharged to the outside of the instant camera body 15, the pressure plate 19 presses the first sheet of the instant film 4 against the exposure opening 8 to enable photographing. Then, when the shutter button 23 is pressed to complete the photographing, the claw 10 operates again to push the first instant film 4 out of the film exit 11.

Then, the developing roller 21 starts rotating almost at the same time as the operation of the claw 10, and when the end portion of the extruded instant film 4 is nipped, the instant film 4 is ejected from the opening 22 by its rotational force.
At this time, since the developing solution pod 4b of the instant film 4 is crushed by the developing roller 21 and the developing solution inside is spread over the entire surface of the exposure sheet 4a, the instant film 4 discharged from the opening 22 can be discharged in a few minutes. A clear image of the subject you just shot appears.

Thus, the last instant film 4
After all the images have been taken and discharged, the back cover 17 of the instant camera body 15 is opened, and the used instant film pack 2 which is only the pack case 3 and the elastic plate 7 is taken out.

The used instant film pack 2 that has been taken out, and the light-shielding plate 5 that has been pulled out first,
The light-shielding sheet 6 is made of a single material such as resin or paper as described above, and does not include a conventional metal pressure plate or the like. Therefore, the light-shielding sheet 6 does not need to be disassembled and sorted according to the material. It is very convenient because it can be put into the recycling process or discarded.

FIGS. 6, 7 and 8 are sectional views of another embodiment of the instant film pack embodying the present invention.
The instant film pack 31 is similar to the previous embodiment.
It comprises a pack case 32, an instant film 4 incorporated therein, a light shield plate 36, a light shield sheet 35, and a thin elastic plate 39. However, in the previous embodiment, the shading plate and the shading sheet were stored inside the pack case before the start of use, but in this embodiment, the shading plate 36 and the shading integrated with the shading plate 36 are provided outside the pack case 32. Sheet 35
Is attached so that it can be peeled off.

In the pack case 32 of the instant film pack 31, the instant film 4 and the elastic plate 3 are provided.
9 is stored. The exposure opening 3 provided on the front surface of the pack case 32 is provided outside the pack case 32.
A light-shielding sheet 35 made of a soft light-shielding resin sheet is doubly attached to the pressing openings 34 provided on the back surface 3 and the back surface of the pressing opening 34 so as to be folded back at their lower portions, and light-tightly covers them. Further, one end of the light shielding sheet 35 has a black light shielding hard resin,
It is fixed to a light-shielding plate 36 formed by molding pulp or the like into a plate shape. The light blocking plate 36 is attached to the surface of the light blocking sheet 35 covering the exposure opening 33 so as to close the exposure opening 33.

At the start of use of the instant film pack 31, after being set in the instant camera,
The light blocking plate 36 is pushed out by the claw 37 on the camera side, and the vicinity of the fixing portion of the light blocking sheet 35 with the light blocking plate 36 is bent as shown in FIG. 7, while peeling the attachment between the exposure opening 33 and the light blocking sheet 35, First, the light shielding plate 36 is discharged.

Next, the exposure opening 33 of the pack case 32
The light-shielding sheet 35 that has been peeled off to the upper surface of the side is further pulled by the light-shielding plate 36 discharged by the photographer, and as shown in FIG. While the folded back portion of 35 is moved upward, it is peeled off through the upper surface of the pack case 32.

At this time, since the light-shielding sheet 35 double-covers the exposure opening 33 and the pressing opening 34 so as to be folded back at the bottom, the light-shielding sheet 35 presses the exposure opening 33 and the pressing opening 34 from the outside. Even if the light-shielding sheet 35 is attached with a constant adhesive strength that can withstand the above, the attached light-shielding sheet 35 is discharged so as to be peeled off from each folded back end. Therefore, it is possible to easily discharge without requiring a large drawing force. In this way, when the light shield plate 36 and the light shield sheet 35 attached around the pack case 32 are completely peeled off and discharged to the outside of the camera, photography is possible.

Such an instant film pack 3
In the case of No. 1 as well, after all the images have been taken, the light-shielding plate 36 and the light-shielding sheet 35 do not contain metal or the like as in the previous embodiment,
It is very convenient because it can be put into the recycling process or discarded as it is without disassembling and separating the materials.

The instant film packs of the two embodiments described above do not include a metal pressing member or the like, so a flat metal plate is cut into a frame and pressed to form a pressing member. It is possible to omit the troublesome work of making a pressure plate, adjusting the spring pressure and incorporating it into the pack case, and it has become possible to greatly improve the production efficiency and cost of the instant film pack.

[0029]

As described above, according to the instant film pack of the present invention, by using the instant camera having the pressing member for pressing the instant film contained in the instant film pack,
It is possible to provide an instant film pack in which the structure of the instant film pack is simplified to reduce the manufacturing cost and which can be easily recycled after use.

[Brief description of drawings]

FIG. 1 is a sectional view of an instant film pack embodying the present invention.

2 is a cross-sectional view of the instant film pack of FIG. 1 when a light shielding plate is discharged.

3 is an external perspective view of the instant film pack of FIG. 1. FIG.

FIG. 4 is a sectional view of an instant film pack embodying the present invention when loaded in a camera.

FIG. 5 is an external perspective view of a camera into which the instant film pack of the present invention can be loaded.

FIG. 6 is a sectional view showing another embodiment of the present invention.

FIG. 7 is a cross-sectional view showing another embodiment of the present invention.

FIG. 8 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 2 Instant film pack 3 Pack case 4 Instant film 5 Light-shielding plate 6 Light-shielding sheet 8 Exposure opening 9 Pressing opening 10 Claw 19 Pressure plate

Claims (2)

[Claims] 1. A plurality of instant films are stacked and housed in a pack case having an exposure opening on the front surface and a slit-shaped discharge opening on one side surface, and between the uppermost instant film pack and the exposure opening. In an instant film pack having a light-shield plate inserted therein, an opening into which a pressing member that presses the instant film toward the opening enters is formed on the back surface of the pack case, and a flexible light-shielding sheet covering the opening is formed. An instant film pack, wherein one end is fixed to a rear end of the light-shielding plate, and the light-shielding plate is pulled out from the tip through the discharge port so that the light-shielding sheet can be pulled out. 2. An instant film pack in which a plurality of instant films are stacked and housed in a pack case having an exposure opening on the front surface and a slit-shaped discharge opening on one side surface, wherein the instant film is provided on the back surface of the pack case. A flexible band-shaped light-shielding sheet that covers the opening in a light-tight manner from the outside of the pack case is bent at the side surface facing the discharge opening, and the opening is formed by the pressing member that presses the opening toward the opening. An instant film pack comprising: a double-sided cover, a cover for the discharge opening, a cover for the exposure opening, and a rear end of the light-shielding plate.